MengZhongZhuiXing的博客

koa2+sequelize 实现登录创建用户这次的登录注册为后台的简单登录及创建用户用到的模块:"bcryptjs": "^2.4.3","jsonwebtoken": "^8.5.1","koa": "^2.7.0","koa-bodyparser": "^4.2.1","koa-json": "^2.0.2","koa-router": "^7.4.0","mysql2": "^2.2.5","node-uuid": "^1.4.8","sequelize"

var colors = ["red","blue","green"];colors.length  //计算数组长度Array.isArray(colors) //检测是否为数组colors.join(",")  //指定引号内的字符串为分隔符colors.push("red","green")  //推入数组的最后colors.pop

var test = “aa” 定义的变量只在该变量的作用域中有效test = “aa“ 定义的变量为全局变量，但不推荐例：function test(){var test 1= "11";}test();console.log(test1); //错误function test(){ test 1= "11";}test();c